He was born in 1816/17 (2 (44 in 1861)).
When he enlisted, he was living at Philadelphia, Pennsylvania (2).
He enlisted and was mustered into service, at Philadelphia, Pennsylvania, on 15 November 1861 (1, 2). He was mustered in as a private, in company B (1, 2, 3-4).
He was not on the muster-out roll when the regiment mustered out (1, 2). He was a private, in company B (3-4).
1 Bates, Samuel Penniman. History of Pennsylvania volunteers, 1861-5. Harrisburg: B. Singerly, state printer, 1869-71. 5 volumes. 'Ninety-first regiment', volume 3, pages 186-233. (In the roster) (Thomas O'Bryan)
2 Civil War Veterans' Card File, available at the Pennsylvania State Archives, searched 29 June 2004 (Thomas O'Bryan)
3 index to compiled service records of volunteer Union soldiers who served in organizations from the state of Pennsylvania (Thomas O'Bryne [sic])
4 index to compiled service records of volunteer Union soldiers who served in organizations from the state of Pennsylvania (Patrick O'Bryan)